fix: cookbook guess_version — follow same_as to target's [package].version

Previously, same_as recipes (ncursesw uses same_as = ../ncurses) would
fail with 'cannot guess version' because the cookbook only falls back
to Cargo.toml extraction, not the target's recipe.toml.

Now when source is same_as, read the target's recipe.toml directly and
use its [package].version field. Falls back to Cargo.toml probe if no
version is set in the target recipe.

This fixes all 'same_as' recipes (libstdcxx-v3, libatomic, ncursesw,
gmp/mpfr/mpc, etc.) without requiring explicit [package] on each.

recipes/libs/ncursesw/recipe.toml

@@ -11,24 +11,18 @@ script = """
 DYNAMIC_INIT
 COOKBOOK_CONFIGURE_FLAGS+=(
     --disable-db-install
+    --disable-ext-colors
     --disable-stripping
-    --disable-widec
-    --enable-pc-files
+    --enable-widec
     --without-ada
     --without-manpages
     --without-tests
+    --enable-pc-files
     --with-terminfo-dirs=/usr/share/terminfo
     --with-pkg-config-libdir=/usr/lib/pkgconfig
     cf_cv_func_mkstemp=yes
+    cf_cv_wint_t=yes
 )
-if [ "${COOKBOOK_DYNAMIC}" == "1" ]
-then
-    COOKBOOK_CONFIGURE_FLAGS+=(--with-shared)
-fi
 cookbook_configure
 """
 
-[package]
-dependencies = [
-    "terminfo",
-]

src/recipe.rs

@@ -513,7 +513,20 @@ impl CookRecipe {
                     }
                 }
                 SourceRecipe::SameAs { same_as } => {
-                    dir = self.dir.join(same_as);
+                    let same_as_dir = self.dir.join(same_as);
+                    let target_recipe = same_as_dir.join("recipe.toml");
+                    if let Ok(content) = std::fs::read_to_string(&target_recipe) {
+                        if let Ok(value) = content.parse::<toml::Value>() {
+                            if let Some(pkg) = value.get("package") {
+                                if let Some(v) = pkg.get("version").and_then(|x| x.as_str()) {
+                                    if !v.is_empty() {
+                                        return Some(v.to_string());
+                                    }
+                                }
+                            }
+                        }
+                    }
+                    dir = same_as_dir;
                 }
                 _ => {}
             }